Bobbin-holder.



No.'809,624. V PATENTED JAN. 9, 1906. T. J. MURDOOK.

BOBBIN HOLDER.

APPLICATION FILED DEC. 29, 1902.

UNITED STATES PATENT UFFICE.

THOMAS J. MURDOCK, OF FRANKLIN, MASSACHUSETTS, ASSIGNOR TO MURDOCK ANDGEB COMPANY, OF FRANKLIN, MASSACHUSETTS.

BOBBIN-I-HOLDER.

Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed December 29,1902. SerialN0.136,902.

To (all whmn it may concern:

Be it known that I, THOMAS J. MURDocK, a citizen of the United States,residing at Franklin, in the county of Norfolk and State ofMassachusetts, have invented a new and useful Improvement inBobbinHolders, of which the following is a specification.

This invention has reference to a device for simplifying andfacilitating the operationof securing bobbins to the spindles ofspinningmules or spinning-machines.

The object of this invention is to construct an automatic lockingbobbin-holder that will lock the bobbin-head in the holder by a downwardmovement of the bobbin on the spindle and will release it by an upwardmovement of the bobbin by the operator, leaving the locking-jaws in anopen position for the next bobbin, as will be more fully set forthhereinafter, and pointed out in the claims.

Figure 1 is a side view of a spindle provided with my improved automaticlockingholder, showing a full bobbin locked in the holder, the positionthe thread would assume after being carried down by the faller-arm, andthe points for catching and holding the thread when the bobbin isdoffed. Fig. 2 is a plan view of the bobbin-holder, with the spindle insection, showing the circular operating-frame surrounding the spindle,the clamping-arms held in their contracted position by the annularspring, and the upper ends of the locking-jaws in their closed position.Fig. 3 is a plan view looking at the under side of the bobbin-holder,showing the endless coiled spring in engagement with the lower ends ofthe clamping-jaws for holding them in their open position. Fig. 4 is across-sectional view taken on line X X of Fig. 1 through the holderlooking upward, showing the position of the clamping-arms with theapertures for the locking-jaws, and the means for securing the partsforming the body of the holder together. Fig. 5 is a vertical sectionalview of the bobbin-holder and bobbinhead, showing part of the spindleand the bobbin-holder in its closed position, with theloeking-jawslocked into the groove in the peripheral surface ofthe head of thebobbin. Fig. 6

is a sectional view similar to Fig. 5, showing the holder in the openposition and the bobbin removed from the holder. Fig. 7 is acrosssectional detail view, and Fig. 8 is asectional detail view lookingfrom the inside, showing the means for securing the plate and frameforming the body of the holder together. Fig. 9 is a plan View of two ofthe clamping-arms formed in one piece from sheet-metal with aperturesfor two of the locking-jaws and a central hole for securing it in thebody of the holder; and Fig. 10 is a sectional view, taken lengthwise,on line Y Y of Fig. 9 through the clamping-arms.

In the drawings, a indicates the spindle, a the bobbin, a the head, anda a groove in the peripheral surface of the head of the bobbin. Thefixed parts of the holder are secured together by the ring b,formed likean eyelet with the head I) to form a shoulder. The two springplates 6 6forming the clamping-arms Z2 1) with the apertures 7)" 6* for thelocking-jaws to pass through, are placed at right angles to each otheron the ring Z) through the central openings 6 The plate 0, stamped fromsheet metal, with the openings 0 0', the slots 0 c and a central hole,is now placed on the ring 5 through the central hole and the wholesecured together by upsetting the upper end of the ring 5 onto the plate0. The fixed frame tl'has the inwardly and upwardly extending V flange(.Z with the short arms (Z (Z contracted at their upper ends (Z to formshoulders and is secured to the plate 0 by the ends (Z entering theslots 0 c in the plate 0 and clamped, as shown in Figs. 7 and 8. Themovable frame 0, with the lip c to limit the downward movement of thethread, the thread-catching points 0 c on the upper edge, and the slots0 c in the top, carries the locking-jaws ff. In the preferred form thelower end of the lockingjaws are shouldered on the top of the frame 0,where they extend through the slots (1 c and are then looked over theendless coiled spring g, the shoulders and slots 0 c forming pivots forthe locking-jaws in the frame (2. The upper ends of the locking-jaws arebent inward to form the lips ff and near the upper ends are shaped toform the bends f f acting as cams on the clamping-arms b 6 to close thelocking-jaws. The operating-frame it is shaped to form the head it withthe hole if for the spindle and the downwardly-extend ingspringarms b[b3 with the outwardly-bent ends h h entering indentures stamped intothe lockingjaws, as shown in Figs. 5 and 6. The downward movement of thebobbin on the spindle brings the head of the bobbin into engagement withthe head of the operating-frame it,

forcing it downward and carrying with it the locking-jaws ff and theframe 6, closing the jaws onto the head of the bobbin against thetension of the endless coiled spring 9, the lips f f on the locking-jawsentering the groove (0 in the bobbin-head, locking the bobbin in theholder. As the heads of bobbins are not always of an exact size and tofirmly hold the bobbin, I make the clamping-arms b b of spring metal andreinforce them with the annular spring 2', supported in grooves in theclamping-arms.

The bobbin-holder is secured by driving the ring I) onto the spindle,and when assembled the locking-jaws are held in their operative positionin the holder by the apertures 6* b in the spring clamping-arm plates bIf and the openings 0' 0' in the plate a, secured to the ring 5.

In the holder, as shown, I use four lockingjaws and four clamping-arms,the clampingarms being made in two parts. By this means I get the plate6 with the two clamping-ar ms 6 6 in one piece, as shown in Figs. 9 and10, with the grain of the metal running lengthwise,-with less liabilityof breaking than if the four clamping-arms were made in one piece,bringing the grain of the metal across two of the arms.

When the bobbin is full, as shown in Fig. 1, the faller-arm carries thethread downward below the bobbin and onto the bobbin-holder, catching onthe points a and as the fallerarm stops opposite to the flange 6* of themovable frame 6 any excess of yarn will be wound on the flange e". WVhenthe bobbins are doffed, leaving the bobbin-holder in the open position,the new bobbins are now placed on the spindlesand the faller-arm islifted, thereby pulling up from off the flange a" the excess of yarnwound thereon, the spindles now being given a turn or two to start thewinding of the yarn on the bobbins. The bobbins are then forced down onthe holder and locked in position by the same and the machine startedup. By this means there is very little waste in the doffing of themachine.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A bobbin-holder having a plurality of pivotedlocking-jaws, an endless coiled spring, two spring plates havingclamping arms formed integral therewith and held in contact with thelocking-arms by the endless coiled spring, and means for operating thelockingjaws to firmly secure the bobbin in the holder when in the lockedposition, substantially as described.

2. A bobbin-holder having a plurality of locking-jaws for lockingabobbin-head in the holder, means for automatically opening or closingthe locking-jaws, and two spring-plates having clamping-arms formedintegral therewith and held in contact with the locking-jaws in theirlocked position by an endless coiled spring to firmly secure thebobbin-head in the holder. i

3. A bobbin-holder having a plurality of locking-jaws, anoperating-frame in connection with the locking-jaws, spring-platesprovided with clamping-arms formed integral therewith and in contactwith the lockingjaws, an endless coiled spring and bends in thelocking-jaws acting as cams on the clamping-arms to assist the coiledspring to force the locking-jaws inward by a downward movement of abobbin on the operating-frame to lock a bobbin-head in the holder, asdescribed.

4. In combination, a bobbin-holder having a plurality of pivotedlocking-jaws, a movable frame carrying the locking-jaws pivoted in theframe, an operating-frame in connection with the locking-jaws, a fixedframe, means for securing the fixed frame to a spindle, springclamping-arms in the fixed frame in contact with the locking-jaws, bendsin the lockingjaws acting as cams on the clamping-arms to force and lockthe locking-jaws into a groove in the peripheral surface of the head ofa bobbin, when the operating-frame is forced downward by thebobbin-head, and an endless spiral spring in connection with the lowerends of the locking-jaws below the pivots to open the jaws when thebobbin is moved upward, as de-' scribed.

5. In combination with a bobbin-holder, clamping-arms stamped from sheetmetal to form a plate 6 with two clamping-arms b 5 apertures 12* 6*, anda central opening 6 for securing the plate 6 in the holder, asdescribed.

6. A bobbin-holder having a plurality of locking-jaws, a movable framecarrying the locking-jaws, the plate 6 provided with the thread-catching points 0 and the lip e and on which the locking-jaws arepivoted, a fixed frame, spring-plates provided'with clampingarms securedto the fixed frame, and an endless spiral springin connection with theclamping-jaws, as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS J. MURDOOK.

Witnesses:

ADA E. HAGERTY, J. A. MILLER, Jr.

